Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 27
Hydraulics. Rain-gauge. A vessel graduated to measure the fall of rain ina given period. Rediicing-coupling. A fitting for con-necting two sizes of threaded pipe. Resistance. The force that a pump has to work against, caused by gravity, friction, head of water, etc.Reducing Coupling. Right-hand…
Hydraulic machinery · Pumping machinery
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-166-101.webp)
